In article , Roger Long wrote:
Someone asked here quite a while ago about a sail track lubricator that
could be sent up and down the mast to spray dry lube into the track. I
found myself in need of such a device so I built one.

http://home.maine.rr.com/rlma/TrackLube.htm

Took about 15 minutes to make and worked perfectly. Sail now zips up and
down freely again.

I think you should have sent this to a good patent lawyer instead of
sending it here!

Justin.

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Justin C, by the sea.